39results about How to "Reduce construction work costs" patented technology

The invention provides a high temperature resistant silicate cement paste and a preparation method thereof. The high temperature resistant silicate cement paste comprises the following components in parts by weight: 100 parts of oil well silicate cement, 60 to 85 parts of a high-temperature reinforcing material, 68 to 80 parts of fresh water, 1 to 200 parts of a density conditioning agent, 0.1 to1.5 parts of a suspension stabilizer, 0.8 to 1.5 parts of a dispersing agent, 3 to 4 parts of a fluid loss agent, 0 to 3 parts of a retarder and 0.2 to 0.8 part of defoamer. The high temperature resistant silicate cement paste has high sedimentation stability and is rapid in strength development at a low temperature, the compressive strength at the high temperature of 350 DEG C reaches up to morethan 40 MPa, the long-term high-temperature compressive strength development is stable and free of declination, so that the field application requirement of a heavy oil thermal recovery well can be met, and the level of silicate G-level cement used for oil gas well cementing operation is reached.

The invention discloses an upright rod capable of being erected and lowered depending on manpower. The upright rod provided by the invention mainly comprises a rod body and an erecting device capable of erecting and lowering the rod body, wherein the erecting device mainly comprises a fixed plate fixed with an upright rod base, a bottom plate fixedly linked with the rod body to serve as a lever arm, and a feed screw nut erecting driving mechanism; one side of the bottom plate is hinged with the fixed plate through a hinge structure, and the other side of the bottom plate is hinged with a nut used for forming the erecting driving mechanism through a hinge structure in an action mode; a feed screw used for forming the erecting driving mechanism is arranged on the fixed plate through a hingestructure; and the bottom plate is connected with the fixed plate through a fixed linking structure after the rod body is erected. The upright rod provided by the invention has the advantages that the rod body of the upright rod can be erected and lowered by means of operating the erecting device of the upright rod only depending on the manpower with no need of devices and equipment besides the upright rod, thereby solving the problems of high erecting operation cost for using hoisting equipment in the prior art, coordination operation requirements on multiple persons, large labor strength, poor safety and the like when the upright rod is erected and lowered completely depending on the manpower.

The invention discloses an around synchronization hydraumatic jacking process of upper module of an ultra-large marine oil platform. The around synchronization hydraumatic jacking process comprises the following steps of: step 1, arranging a jacking and supporting mechanism at the bottom of each landing leg; step 2, controlling a jacking device to jack a set height journey, supporting an upper structure by virtue of a radial arm, and enabling a jacking device to retract; step 3, enabling a support beam slippage rail to enter a position below the upper structure; step 4, the jacking device supports jacking the set height journey by virtue of the jacking device, rotating the radial arm to support the upper structure, and enabling the jacking device to retract; step 5, enabling a next group of support beam slippage rails to enter the lower part of the support beam, enabling the jacking device to retract, and jacking the upper module for a set height; step 6, repeating the step 3, the step 4 and the step 5 until jacking the upper module to a preset height; step 7, transporting a lower structure to the bottom of the upper module; step 8, enabling the jacking device to retract, and connecting the upper module and the lower structure in a butt joint manner; and step 9, unloading and dismantling auxiliary equipment. The jacking process provided by the invention can realize the multipoint and around synchronization jacking of the upper module and can be used for carrying out effective control on the lifting speed and the displacement precision.

The invention relates to a dual-camera device for monitoring the welding quality of super-thick-wall high alloy steel pipelines. According to the dual-camera device for monitoring the welding quality of super-thick-wall high alloy steel pipeline, two detachable gear rails are symmetrically arranged at the peripheries of the two sides of the beveled edge between two pipelines to be welded, the two detachable gear rails are connected with two camera devices through two connecting parts, and the two camera devices are obliquely and symmetrically arranged. The camera devices comprise fastening screws arranged at the left ends of the connecting parts, antiskid rail blocks arranged at the right ends of the connecting parts, small mesh gears arranged in the connecting parts and connected with the antiskid rail blocks and fixed seats arranged at the upper ends of the connecting parts. Cameras are arranged at the top ends of the fixed seats, photoelectric sensors are arranged at the upper ends of the fixed seats, and the photoelectric sensors are connected with the antiskid rail blocks through transmission lines. The dual-camera device can accurately decide types and specific sizes of welding defects and locate the positions of the welding defects, can effectively reduce the work amount for patching on-site welding junctions, improves work efficiency and reduces construction cost.